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FPS Drop With Regular Weather when Looking at Horizon

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Hello, I dusted off P3D this weekend after a lengthy absence using MSFS as I wanted to fly some of my airliners.

I did two flights and encountered something on both I’ve never seen before.  While using regular weather (ie not enhanced atmospherics) I get a FPS drop to 8-10 when looking at the horizon.  This is both in the cockpit and in spot view.  When I scroll the view up or down in spot view so that I’m looking up at the sky or down at the ground the FPS return to my locked 30fps.  If I turn on enhanced atmospherics the issue goes away altogether.  
 

I’m using active sky with ASCA.  First flight was in the Majestic Q400, second was in the Captainsim 757.  I never saw this previously in P3D.

Any thoughts?

Dave

Current System (Running at 4k): ASUS ROG STRIX X670E-F, Ryzen 7800X3D, RTX 5090, 55" Samsung Q80T, 64GB DDR5 6000 RAM, EVGA CLC 280mm AIO Cooler, Brunner CLS-E NG Yoke, Thrustmaster Warthog HOTAS & Stick, Thrustmaster TCA Quadrant & Add-on, VirtualFly Ruddo+, TQ6+ and Yoko+, GoFlight MCP-PRO and EFIS, Skalarki FCU and MCDU

Time of day?  I vaguely remember reading a while back about an issue with really low sun angles and cloud shadows that caused an ugly frame rate hit, but I don't really remember any of the gory details.

Bob Scott | President and CEO, AVSIM Inc
ATP Gulfstream II-III-IV-V

Sys1 (MSFS20+24/XPlane12+11): AMD 9800X3D, water 2x240mm, MSI MPG X670E Carbon, 64GB GSkill 6000/30, nVidia RTX4090FE
Alienware AW3821DW 38" 21:9 GSync, 2x4TB Crucial T705 PCIe5 + 2x2TB Samsung 990 SSD, EVGA 1000P2 PSU, 12.9" iPad Pro
Thrustmaster TCA Boeing Yoke, TCA Airbus Sidestick, Twin TCA Airbus Throttle quads, PFC Cirrus Pedals, Coolermaster HAF932 case

Sys2 (P3Dv5/v4): i9-13900KS, water 2x360mm, ASUS Z790 Hero, 32GB GSkill 7800MHz CAS36, ASUS RTX4090
Samsung 55" JS8500 4K TV@60Hz,
3x 2TB WD SN850X 1x 4TB Crucial P3 M.2 NVME SSD, EVGA 1600T2 PSU
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PFC yoke/throttle quad/pedals with custom Hall sensor retrofit, Thermaltake View 71 case, Stream Deck XL button box

Sys3 (DCS/P3Dv4/ATS/ETS): AMD 7800X3D, MSI MPG X870E Carbon, Noctua NH-D15S, 64GB GSkill 6000/30, EVGA RTX3090
Alienware AW3420DW 34" 21:9 GSync, Corsair HX1000i PSU, 4TB Crucial T705 PCIe5 + 2TB Samsung 970Evo Plus,
TM TCA Officer Pack
, Saitek combat pedals, TM Warthog, TM RS300 FF wheel/pedals, Coolermaster HAF XB case

  • Author

Tonight's flight was after dark, the first flight was a 1535 local time departure.

Dave

Current System (Running at 4k): ASUS ROG STRIX X670E-F, Ryzen 7800X3D, RTX 5090, 55" Samsung Q80T, 64GB DDR5 6000 RAM, EVGA CLC 280mm AIO Cooler, Brunner CLS-E NG Yoke, Thrustmaster Warthog HOTAS & Stick, Thrustmaster TCA Quadrant & Add-on, VirtualFly Ruddo+, TQ6+ and Yoko+, GoFlight MCP-PRO and EFIS, Skalarki FCU and MCDU

Sunrise and sunset are heavier on the system. 

5950x3d 5.4-5.7 GHz - Asus ROG 870 Crosshair Apex - GSkill Neo 2x 24 Gb 6000 mhz / cas 26 -  MSI RTX 5090 Gaming Trio OC - 1x SSD M2 6000 2TB - 1x SSD M2 2800/1800 1Tb -  Corsair 5400  case - Corsair 360 liquid cooling set  - 3x 75’ TCL tv.

13600  6 cores @ 5.1 GHz / 8 cores @ 4.0 GHz (hypterthreading on) - Asus ROG Strix Gaming D - GSkill Trident 4x Gb 3200 MHz cas 15 - Asus TUF RTX 4080 16 Gb  - 1x SSD M2 2800/1800 2TB - 2x  Sata 600 SSD 500 Mb - Corsair D4000 Airflow case - NXT Krajen Z63 AIO liquide cooling - 

FOV : 200 degrees

My flightsim vids :  https://www.youtube.com/user/fswidesim/videos?shelf_id=0&sort=dd&view=0

 

  • Author

My shadow settings are attached.  Godrays are on but I thought they only worked when in EA mode?  I'm only having this issue when not in EA mode.

I just replicated the flight from last night (CYHM departure in the CS 757) and tested all different times of day and could not replicate the issue again.  Strange as I had it happen two flights in a row (two different days with a computer shutdown in between) with different aircraft, different locations, different times of day.

Rd6y0UA.jpg

Edited by regis9

Dave

Current System (Running at 4k): ASUS ROG STRIX X670E-F, Ryzen 7800X3D, RTX 5090, 55" Samsung Q80T, 64GB DDR5 6000 RAM, EVGA CLC 280mm AIO Cooler, Brunner CLS-E NG Yoke, Thrustmaster Warthog HOTAS & Stick, Thrustmaster TCA Quadrant & Add-on, VirtualFly Ruddo+, TQ6+ and Yoko+, GoFlight MCP-PRO and EFIS, Skalarki FCU and MCDU

If you ever experience the issue again try with shadows quality Low / draw distance High and see If that solves it..

5950x3d 5.4-5.7 GHz - Asus ROG 870 Crosshair Apex - GSkill Neo 2x 24 Gb 6000 mhz / cas 26 -  MSI RTX 5090 Gaming Trio OC - 1x SSD M2 6000 2TB - 1x SSD M2 2800/1800 1Tb -  Corsair 5400  case - Corsair 360 liquid cooling set  - 3x 75’ TCL tv.

13600  6 cores @ 5.1 GHz / 8 cores @ 4.0 GHz (hypterthreading on) - Asus ROG Strix Gaming D - GSkill Trident 4x Gb 3200 MHz cas 15 - Asus TUF RTX 4080 16 Gb  - 1x SSD M2 2800/1800 2TB - 2x  Sata 600 SSD 500 Mb - Corsair D4000 Airflow case - NXT Krajen Z63 AIO liquide cooling - 

FOV : 200 degrees

My flightsim vids :  https://www.youtube.com/user/fswidesim/videos?shelf_id=0&sort=dd&view=0

 

  • Author

Thanks Gerard.  Hopefully this is just one of those weird P3D gremlins that I won’t run into again but I’ll try that if I do.

Dave

Current System (Running at 4k): ASUS ROG STRIX X670E-F, Ryzen 7800X3D, RTX 5090, 55" Samsung Q80T, 64GB DDR5 6000 RAM, EVGA CLC 280mm AIO Cooler, Brunner CLS-E NG Yoke, Thrustmaster Warthog HOTAS & Stick, Thrustmaster TCA Quadrant & Add-on, VirtualFly Ruddo+, TQ6+ and Yoko+, GoFlight MCP-PRO and EFIS, Skalarki FCU and MCDU

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